- allow installing samples sources on all platforms
  even if BUILD_EXAMPLES is disabled,  fixed minor
  issues in sources installation process
- use 'example_<group>_<name>' scheme for target and binary file naming
- use single function for sample executable creation

057cd52 first versions: cv::ogl::convertFromGLTexture2D & cv::ogl::convertToGLTexture2D
5656e94 added autogenerated stuff for cl_gl.h
765f1fd resolved CL functions in opengl.cpp
9f9fee3 implemented function cv::ogl::ocl::initializeContextFromGLTexture2D()
a792adb cv::ogl::ocl::initializeContextFromGLTexture2D() - added linux support (glx.h)
51c2869 added missing error message in function cv::ogl::ocl::initializeContextFromGLTexture2D()
513b887 fixed extension call in function cv::ogl::ocl::initializeContextFromGLTexture2D()
475a3e9 added CL-GL interop Windows sample (gpu/opengl_interop.cpp)
07af28f added building of CL-GL interop sample - Windows only
befe3a2 fixed whitespace errors & doxygen warnings (precommit_docs)
551251a changed function name to cv::ogl::ocl::initializeContextFromGL(), removed unused argument
4d5f009 changed CL_DEVICES_FOR_GL_CONTEXT_KHR to CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR
9fc3055 changed CL_DEVICES_FOR_GL_CONTEXT_KHR to CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KH
6d31cee Revert "changed CL_DEVICES_FOR_GL_CONTEXT_KHR to CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KH"
cc6a025 added texture format check in cv::ogl::convertFromGLTexture2D()
063a2c1 CL-GL sample: added Linux implementation (Xlib/GLX)
c392ae9 fixed trailing whitespace
85a80d0 fixed include files
ae23628 excluded samples/opengl from build case 2
9870ea5 added android EGL support
530b64c added doxygen documentation comments to CL-GL interop functions

Add depends from highgui to imgcodecs and videoio. And include header from imgcodecs and videoio to imgcodecs

Allow to build samples via OpenCV binaries from distribution package
(find_package with OpenCV_DIR).

ReadMe.txt for OpenCV Manager added;
share folder excluded from SDK.

Suppressed hundreds of useless MSVC warnings (can be reenabled setting cmake variable ENABLE_NOISY_WARNINGS to ON). Fixed some of remaining warnings.

lot's of changes; nonfree & photo modules added; SIFT & SURF -> nonfree module; Inpainting -> photo; refactored features2d (ORB is still failing tests), optimized brute-force matcher and made it non-template.

 [~] Automatically tracked dependencies between modules
 [+] Support for optional module dependencies
 [+] Options to choose modules to build
 [~] Removed hardcoded modules lists from OpenCVConfig.cmake, opencv.pc and OpenCV.mk
 [+] Added COMPONENTS support for FIND_PACKAGE(OpenCV)
 [~] haartraining and traincascade are moved outside of modules folder since they aren't the modules

[~] fixed warning in featuers2d under windows (can't generate assignment operator)

2) NVidia tests for GPU
3) FD sample that uses NVidia's interface.

fixed TargetArchs implementation in case when HAVE_CUDA=false, added initial structure for multi_gpu sample

2) added mask support to device 'transform' function 
3) sample hog gpu: waitKey(1) -> waitKey(3), in other case image is not displayed.